Diaphragm pump



May 10, 1949 c. A. ERICKSON 2,469,818

DIAPHRAGM PUMP Filed Oct. 28, 1946 2 Sheets-Sheet 1 if 77 W9 May 10,1949. c. A. ERICKSON 2,469,818

DIAPHRAGM PUMP Filed oct, 28, 194e z sheets-sheet 2 74 v73 41 SI I@ j/2\\: I4? :@s?

y of the pump;

Patented Moy.10, .1949

UNITI-:D s'rArEsPArEN'r OFFICE DIAPHRAGM PUMP Charles A. Erickson,Dearborn, Mich., assignor, f, by mcsnel assignments, to F. L. Jacobs4Co., De- 'troit, Mich., a corporation oi Michigan Application October28, 1946, Serial Np. 706,113

pump and particu- The invention isillustrated more or less dia-rgrammatically in the accompanying drawings, wherein:

Figure 1 is a vertical section through one form Figure 2 is a ure 1;

Figure 3 is a vertical section of a modified form of pump;

plan view of the pump of Fig- 1 Claim. (Cl. 103-150) Figure 4 isasection taken at line 4 4 of Fig- A prises a housing which is preferablymade invitwo pieces or sections. As shown, there is an upper housingmember I provided with an inlet passage 2 which may be threaded as at 3to receive a conduit. The inlet passage 2 communicates with a centralinlet passage 4 which is formed within an annular member 5. An 'annularchamber 6 is formed within the housing about the member 5 and comprisesa pressure dome. An outer wall 1 encloses the annular pressure domechamber 6. An outlet passage 8 is formed in the wall 1 and may bethreaded as at 9. The housing wall 1 is preferably enlarged or ilaredoutwardly as at I9 and may be provided with an innercurved face orsurface II. The annular wall 5 is preferably provided' with a reduceddownward extension I2 which, at its upper end, terminates in an internalshoulder I3 and on its outer surface terminates in an external shoulderI4. -A ilange I6 is formed as a part of the housing member and may carryone or more ears I1 to receive fastening members, such as screws, I9 forjoining the upper housing section to' a lower'housing section. 'Ihelower housing member is designated generally by the' numeral I9 and mayinclude a ange 29 with ears 2i in which the screws I3 are received. Theiiange 20 and the ange I 6 are so dimensioned that the ange I6 Vmay twithin the ange 20. The housing member I9 may be perforated as at 22 topermit the escape of liquid should any enter the housing. A downwardextension 23 from the housing I9 provid a space for operating meanswhich will be described below. The member 32 extends laterally as at 33and is open as at 34 to permit the entrance of and positioning ofoperating means. 'I'he portion 33 may be of any desired shape to furnishmeans whereby the pump may be attached to a suitable mounting orsupport.

A valve supporting and positioning member 35, as shown-in Figures 1 and5, may be shaped to correspond somewhat to the curvature Il of themember I9, and Ait terminates in a flange 36 shaped to `extend beneath,the flange I6 of the upper housing member and shaped also to itwithinthe flange 20 of the lower housing member. The member is providedwith a generally attened portion 31 perforated es at 38. About each ofthe perforations38 is a raised portion 39 comprising a valve seat. Avalve ring 40 is positioned about the member I2 above the openings 38,within the lower portion of the annular space 6 and is adapted to beseated against the valve seats 3 9 to close them. A spring 4| bears atone end against the shoulder I4 and at' the other end against the valve40 'and is biased to seat the valve.

The member 35 is also provided with a generally central upward extension42 which terminates at its upper end in a valve seat 43 and which is cutaway in one or more places as at 44. A packing or sealing member 45 maybe positioned about the upward extension 42. A valve 46 is positionedwithin the space defined by thermember I2 and above the extension 42. Aspring 41 is positioned Vto be seated against a seating member 48. Ths

A packing member 49 may be positioned above the flange 35 and below theflange I6.

A diaphragm rod 50 is positioned to move within the housing I9and toextend into the space 'defined by the housing portion 32. Fixed to it isa diaphragm 5I which is gripped at its edge by the flange 36 and theange 20 when the two housing sections are joined together. Stiffeningdiscs 52 and 53 are secured respectively above and belowV the diaphragm5I and are fastened to the member 50 by a rivet, screw or otherattaching member 54.

At its lower end, the member 59 may be headed means may be positioned onthe member-59 to act as a cushioning and silencing means.

The rocker'arm or lever is provided 'with a sup-f I port Si which isheld in a bearing 82 by a retaining member 03. This member is, itself,removably held in place in the lower housing section by a screw 6I orotherwise. The 'rocker arm may be of any desired shape; as shown inFigure 1, it is upwardly shaped as at 65 and carries a cam contactingmember 88 which is adapted to contact a cam 61 or amv other desiredoperating means.

If desired, a sealing means may be providedv about the rod 50. Thismeans includes packing or cushioning members 68 which lit 'tightly incontact with the member 50 and are held in place by enclosing parts 89.In the particular form shown in Figure 1, the parts 69 serve also as aseat for the lower end of the operating spring 10. The upper end of thisspring is in contact with the stiifener 53 beneath the diaphragm 5l. Thespring 10 is biased to hold the diaphragm in the raised position.

The modified form of Figure 3 is generally the same as that describedabove, and only so much will be re-described'as diiers from thestructure above described. The pump housing, the valve supporting meansand the other parts are substantially the same. The inlet passage member1| is extended and is longer than the inlet passage member 2. At itsouter end it is threaded as at 12 to receive a conduit. Within thepassage member 10 is a directing means 13 which directs entering iiuiddownwardly through the passage 14 into the bowl 15. The bowl issupported on the member 1I and is removably held in place by a bail 16,which is provided with a tightening thumb nut 11 against the holding 4makes sure that the dome will remain clear of liquid and will remaineffective. l

'I'he valve assembly member which includes the portions dening theoutlet valve seats, the member for limiting the inward movement of theinlet valve and meanslfor engagement between the two housing members isa unit, and may be made by stamping, spinning or any other desiredmanner. Because it. is a unitary member it insures accurate positioningof the various inlet and outlet valve passage and members in assemblyand simplifles assembly of the total device. It is not necessary tocarry out individual seating or adjustment of various valve members inthe assembly of the device. Similarly,`when the device is taken apartfor cleaning or repair and is reassembled, both operationsA aresimpliiled and made more certain and accurate by reason of the fact thatthe member which positions and denes the inlet and outlet openings toand from I the pumping chamber is a unitary member.

In the modified form the construction of the pump proper is the same asthat disclosed in the member 'I8 to hold the bowl tightly in position.

cent the engine, for example, on the crankcase,

and the rocker arm or operating lever is placed where it can be operatedby a' rotating member, such as the cam shaft. It is connected to asource of liquid and the outlet or discharge side is connected to acarburetor or other point of use, When the -cam shaft rotates the pumpdiaphragm is moved up and down through the linkage shown 'and producesalternate suction and discharge strokes. As the diaphragm is drawndownwardly liquid is drawn through the inlet passage and the inlet valveis unseated and moved downwardly to permit the entrance of liquid.

The suction which causes the liquid to enter also holds the outlet valveseated on the several outlet valve seats. When the diaphragm, is raised.

dome is effective and its operation is made sure guiding means, while,permitting liquid to move outwardly through the outlet valve openingswhich prevents illling of the vapor dome and thus earlier flgures. Theonly dierence is the provision of a bowl which may be transparent. For

example, it may be made of glass. The bowl permits a user by inspection,without taking the device apart to check the operation of the pump andto check the condition of the liquid moving to the pump.

The features above discussed can. be embodied in a pump with or withoutthe stuffing box mechanism shown and can be embodied in a pump arrangedwith any desired'rocker arm or operating lever. The invention is notlimited, therefore, to the particular means shown for reciprocating thediaphragm. While the pump itselfwill ordinarily be made of metal, it maybe made of any material.

I claim:

In combination in a liquid pump, a pair of housing members and means forsecuring them releasably together, one of said housing members shaped tofit within the other, inlet and outlet passages formed in one of saidhousing members. and an annular integral pressure dome formed withinsaid housing member and positioned concentrically with a portion of saidinlet passage, a unitary member including a central inlet, and aplurality of outlet valve seats positioned about said inlet, saidunitary member Aprovided with a portion adapted to'be gripped and heldbetween said housing members. a ring-like valve member positionedadjacent to and adapted to be seated upon said outlet valve seats, saidoutlet valve member shaped of rigid material, and a spring biased tohold it seated, said outlet valve member being guided by a portion ofthe housing member within which said inlet passage is formed, and aninlet valve positioned to be seated to close said inlet, and a springbiased normally to hold said inlet valve closed.

CHARLES A. ERICKSON.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Name Date 986,122 Astrom Mar. 7, 1911 2,016,580Schulze et al. Oct. 8, 1935 2,080,392 Rockwell May 11, 1937 2,139,347Babitch et al. Dec. 6, 1938 2,382,797 Longan Aug. 14, 1945

